Lilly (or Jamaica) ponders by a goldfish pond, spear in hand, after suffering defeat in practice combat. As lightening crashes overhead, she sees the jagged flashes as a reflection in the water. The bolts super-impose themselves on the spear and form the image of a cross-piece. This gives her the idea of adding a cross-piece to her spear, and this gives her a combat advantage on the following day.
This is an example of the flash of inspiration so often referred to in the advanced schools of Japanese martial arts. This particular story somes from the Hozoin Ryu, a spear school founded by a Buddhist sect.